Biofilm process integrated sewage treatment device

Abstract

The utility model provides a biofilm process integrated sewage treatment device. The biofilm process integrated sewage treatment device comprises an anoxic reaction assembly, a pipeline communication assembly, a convection reactor and a sedimentation clarification tank, the anoxic reaction assembly is connected with the convection reactor through the pipeline communication assembly, and the convection reactor is communicated with the precipitation clarification tank through the siphon pipeline assembly; the bottom of the high-level water tank is arranged above the convection reactor, one end of the siphon pipeline assembly is arranged in the convection reactor, and the other end of the siphon pipeline assembly is arranged in the sedimentation clarification tank. The fluidized filler is filled in a partitioned manner, so that the fluidization effect is achieved, and the problems that the filler is easy to block and integrally gathers and escapes in the existing SBBR and MBBR processes are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sewage treatment, especially relates to a biological membrane method integrated sewage treatment device. BACKGROUND

[0002] As a process combining the activated sludge method of suspended growth and the biofilm method of attached growth, the MBBR method has the advantages of both: less land occupation - it only needs 20% of the volume of an ordinary oxidation tank under the same load conditions; microorganisms attach to the carrier and flow with the water flow, so there is no need for activated sludge backflow or cyclic backwashing; the carrier organisms continuously fall off, avoiding blockage; the organic load is high, and the ability to withstand impact load is strong, so the effluent water quality is stable; the water head loss is small, the power consumption is low, the operation is simple, and the operation and management are easy; and it is suitable for transformation projects and the like.

[0003] Many engineering examples show that the MBBR method has good effects on treating sewage, but the MBBR process is prone to the following problems in operation:

[0004] 1. The fluidization state of the MBBR reactor is not easy to control;

[0005] The fillers in the reactor are in a fluidized state by means of aeration and the lifting action of the water flow, which not only consumes a large amount of electric energy, but also often causes local filler accumulation due to uneven distribution of air intake in the entire tank in actual operation. Therefore, it is necessary to continuously adjust the aeration amount of each aeration head according to the actual situation, resulting in unstable operation of the process.

[0006] 2. The problem of filler grid plate blockage;

[0007] In order to prevent the fillers from being lost with the treated water, a grid plate is arranged at the outlet of the moving bed biofilm reactor. However, the grid plate is prone to blockage during operation and debugging, and even when a perforated plastic plate is used as the grid in the laboratory, the grid plate at the outlet is also blocked by large groups of suspended sludge. Although aeration at the grid plate at the outlet can prevent the fillers from blocking the grid plate, the problem of attachment of suspended sludge can only be solved by the material and spacing of the grid plate, which also affects the normal operation of the entire sewage treatment system.

[0008] The sequencing biofilm batch reactor (SBBR) is a new sewage biological treatment process being researched and applied at home and abroad. Foreign research on the SBBR process mainly focuses on the treatment of toxic and refractory organic wastewater, and the treatment effect of the SBBR process on municipal domestic sewage is being actively studied. The sequencing flow bed biofilm reactor in the SBBR process is similar to the MBBR process, and still has the problems of the MBBR process in operation. UTILITY MODEL CONTENT

[0009] Therefore, the biological membrane method integrated sewage treatment device is provided to solve at least one technical problem in the background art.

[0010] To achieve the above object, the technical scheme of the present application is as follows:

[0011] The biological membrane method integrated sewage treatment device is characterized in that: the device comprises an anoxic reaction assembly, a pipeline communication assembly, a convection reactor and a sedimentation and clarification tank; the anoxic reaction assembly is connected with the convection reactor through the pipeline communication assembly; the convection reactor is communicated with the sedimentation and clarification tank through a siphon pipeline assembly; the bottom of a high-level water tank is arranged above the convection reactor, and one end of the siphon pipeline assembly is arranged in the convection reactor and the other end is arranged in the sedimentation and clarification tank.

[0012] A plurality of partitions are vertically arranged in the convection reactor, and the partitions divide the convection reactor into a plurality of independent convection spaces; an intermediate sealing plate is horizontally arranged in the convection reactor, and the intermediate sealing plate divides the independent convection spaces into a first convection zone and a second convection zone; the bottom of the intermediate sealing plate is provided with a communication pipe, the first convection zone and the second convection zone are communicated through the communication pipe, and the siphon pipeline assembly is communicated with the first convection zone.

[0013] The sewage enters the anoxic reaction assembly, enters the convection reactor through the pipeline communication assembly, and the pipeline communication assembly is communicated with an air inlet pipe; when the water flows in the pipeline communication assembly, the external air is mixed with the sewage in the pipeline communication assembly under the action of atmospheric pressure; the sewage enters the siphon pipeline assembly through the convection reactor; when the water level of the second convection zone reaches the set water level, the convection reactor stops water inflow; after the sewage stays for a period of time, the convection reactor continues to inflow water, and the water level continues to rise until siphon action occurs; the siphon pipeline assembly sucks the treated sewage into the sedimentation and clarification tank for sedimentation and purification.

[0014] The anoxic reaction assembly comprises a high-level water tank; the high-level water tank is arranged on one side of the convection reactor, and the height of the high-level water tank is higher than the height of the convection reactor.

[0015] Further, the bottom of the high-level water tank is communicated with the convection reactor through a plurality of pipeline communication assemblies;

[0016] The bottom of the high-level water tank is provided with a water inlet pipe, and the water inlet pipe is provided with a water inlet valve;

[0017] The bottom of the high-level water tank is provided with a high-level vent pipe.

[0018] Further, the high-level water tank is internally provided with a first liquid level meter for monitoring the water level;

[0019] The high-position water tank is internally provided with a first biological rope filler assembly, the first biological rope filler assembly comprises a first biological rope filler frame and first biological rope fillers, the first biological rope fillers are uniformly arranged on the first biological rope filler frame, and the first biological rope filler frame is vertically arranged in the high-position water tank.

[0020] Further, the pipeline communication assembly comprises a first outflow pipe and a second outflow pipe.

[0021] One end of the first outflow pipe and the second outflow pipe is in communication with the water turbine fan, the other end of the first outflow pipe is in communication with the bottom of the high-position water tank, and the other end of the second outflow pipe is arranged in the first convection zone.

[0022] The first outflow pipe is L-shaped, the horizontal end of the first outflow pipe is in communication with the bottom of the high-position water tank, the horizontal end of the first outflow pipe is provided with an outflow electromagnetic valve, and the vertical end of the first outflow pipe is in communication with the water turbine fan.

[0023] The second outflow pipe is connected with a horizontal pipe arranged in the first convection zone, and the horizontal pipe is provided with a plurality of evenly distributed outflow holes.

[0024] The horizontal end and the vertical end of the first outflow pipe are respectively in communication with an air inlet pipe, and the air inlet pipe is provided with an air inlet electromagnetic valve.

[0025] Further, the number of independent convection spaces is the same as that of the pipeline communication assemblies.

[0026] The first convection zone below the intermediate sealing plate of the convection reactor is provided with a first water distribution plate and a second water distribution plate, and the second water distribution plate is arranged above the first water distribution plate; and a dissolved oxygen instrument is arranged at the lower part of the convection reactor.

[0027] The bottom of the convection reactor is provided with a blower aeration assembly, the blower aeration assembly is arranged in the first convection zone, and the blower aeration assembly comprises a blower, a main pipeline, an aeration pipeline, a microporous aeration disc and a dissolved oxygen instrument.

[0028] The blower is connected with the main pipeline, and a plurality of aeration pipelines are in communication with the main pipeline.

[0029] The aeration pipeline is provided with a plurality of microporous aeration discs, and the microporous aeration disc is provided with an aeration hole.

[0030] The dissolved oxygen instrument is arranged between the first water distribution plate and the second water distribution plate.

[0031] Further, the convection reactor is internally provided with a second biological rope filler assembly, the second biological rope filler assembly is arranged in the second convection zone, the second biological rope filler assembly comprises a second biological rope filler frame and second biological rope fillers, the second biological rope filler frame is vertically arranged in the convection reactor, and the second biological rope fillers are arranged on the second biological rope filler frame.

[0032] Further, the convection reactor is internally provided with a second liquid level meter, the second liquid level meter is arranged in the second convection zone.

[0033] The upper portion of the convection reactor is provided with a pressure reducing valve, and the bottom of the convection reactor is provided with a reactor vent pipe.

[0034] The first convection zone of the convection reactor is provided with a plurality of biological ball filler assemblies, and the biological ball filler assemblies are arranged between the first water distribution plate and the second water distribution plate.

[0035] The biological ball filler assembly comprises biological ball fillers and a hollow sphere, and the biological ball fillers are arranged in the hollow sphere.

[0036] The shape of the filler is a cube.

[0037] Further, the number of siphon pipe assemblies is the same as the number of independent convection spaces.

[0038] The siphon pipe assembly comprises a siphon main pipe, a vacuum pipe and a siphon termination pipe.

[0039] One end of the siphon main pipe penetrates through the intermediate sealing plate and communicates with the first convection zone, the lower portion of the sedimentation and clarification tank is provided with an inclined pipe filler, and the other end of the siphon main pipe extends into the inclined pipe filler below the sedimentation and clarification tank.

[0040] One end of the vacuum pipe communicates with the top end of the siphon main pipe, and the other end extends below the liquid surface in the sedimentation and clarification tank.

[0041] The siphon termination pipe communicates with the siphon main pipe, and the vacuum pipe and the siphon termination pipe are communicated through a pipe; the other end of the siphon main pipe is arranged in the second convection zone, and the end of the siphon termination pipe is provided with a siphon terminator.

[0042] Further, the amount of water between the siphon terminator and the highest water level of the second liquid level meter is less than 4 / 5 of the total water storage amount in the first convection zone.

[0043] Further, the bottom of the sedimentation and clarification tank is provided with a plurality of conical parts, and the bottom of the conical part is provided with a sludge discharge pipe.

[0044] The lower portion of the sedimentation and clarification tank is provided with an inclined pipe filler, and one side of the upper portion of the sedimentation and clarification tank is provided with a supernatant discharge port.

[0045] The sedimentation and clarification tank is internally provided with a third liquid level meter, and the third liquid level meter is arranged at a position corresponding to the high liquid level of the sedimentation and clarification tank.

[0046] Compared with the prior art, the biological membrane method integrated sewage treatment device has the following advantages:

[0047] 1、 The application mainly relies on the water body gravity convection and siphon effect to realize the fluidization of the filler, realizes the sufficient contact of the sewage and the filler, the existing process not only needs to charge oxygen to the water body through the air blower, and more importantly, needs to rely on the electric energy to realize the fluidization of the filler by the air blower aeration, in addition to the necessary backflow water pump and the air blower occasional supplementary aeration small amount of electricity, no other electricity, greatly reduce the energy consumption of the existing technology relying on the air blower and the flow promoter to fluidize the filler.

[0048] 2、 The fluidized filler of the application is loaded in a partition, which has the fluidization effect, effectively avoids the problems of filler blockage, overall aggregation and escape, and effectively solves the problems existing in the present SBBR and MBBR processes.

[0049] 3、 The application sets the air inlet pipe outside the outflow pipe, according to Bernoulli's principle, when the sewage in the outflow pipe flows to the filler reaction zone, the air will be mixed with the sewage, which increases the oxygen content in the water without increasing the power consumption, provides an aerobic environment for microbial proliferation, and reduces the impact potential energy of the water head on the filler. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The embodiments of the application illustrated in the drawings are intended to explain the present application and are not intended to limit the present application. In the drawings:

[0051] Figure 1 It is an internal schematic view of the biological membrane method integrated sewage treatment device according to the embodiment of the application.

[0052] Figure 2 It is an air blower aeration assembly schematic view of the biological membrane method integrated sewage treatment device according to the embodiment of the application.

[0053] Figure 3 It is an overall schematic view of the biological membrane method integrated sewage treatment device according to the embodiment of the application.

[0054] Figure 4 It is an internal schematic view of the biological membrane method integrated sewage treatment device according to the embodiment of the application.

[0055] Explanation of the reference signs:

[0056] 1. high water tank; 2, pipeline communication assembly; 3, convection reactor; 4, sedimentation and clarification tank; 5, partition; 6, intermediate sealing plate; 7, first convection zone; 8, second convection zone; 9, communication pipe; 10, air inlet pipe; 11, intelligent control cabinet; 12, water inlet pipe; 13, water inlet valve; 14, high emptying pipe; 15, first biological rope filler frame; 16, first biological rope filler; 17, baffle energy dissipation plate; 18, first liquid level meter; 19, first outflow pipe; 20, second outflow pipe; 21, hydraulic turbine fan; 22, outflow hole; 23, air inlet electromagnetic valve; 24, outflow electromagnetic valve; 25, air blower aeration assembly; 251, air blower; 252, main pipe; 253, aeration pipe; 254, microporous aeration disc; 26, dissolved oxygen meter; 27, first water distribution plate; 28, second water distribution plate; 29, second biological rope filler frame; 30, second biological rope filler; 31, second liquid level meter; 32, pressure reducing valve; 33, biological ball filler assembly; 34, reactor emptying pipe; 35, siphon main pipe; 36, vacuum pipe; 37, siphon termination pipe; 38, clear water zone; 39, tapered part; 40, sludge discharge pipe; 41, third liquid level meter; 42, siphon terminator; 43, inclined pipe filler; 44, supernatant discharge port; 45, upper limit of water tank liquid level; 46, first water level; 47, second water level; 48, high liquid level; 49, low liquid level. DETAILED DESCRIPTION

[0057] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0059] In the description of the utility model, it is to be explained that, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above-mentioned terms can be understood by the specific meaning in the utility model through specific circumstances.

[0060] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0061] Embodiment 1

[0062] As Figure 1 、 3 , 4 shows a kind of integrated biological membrane method sewage treatment device, including anoxic reaction component, pipeline communication component 2, convection reactor 3, sedimentation clarifier 4;Anoxic reaction component is connected with convection reactor 3 by pipeline communication component 2, and convection reactor 3 is communicated with sedimentation clarifier 4 by siphon pipeline component;The bottom of high-level water tank 1 is set in the upper of convection reactor 3, and siphon pipeline component one end is set in convection reactor 3, and the other end is set in sedimentation clarifier 4;Several baffle plates 5 are vertically arranged in convection reactor 3, and baffle plate 5 divides convection reactor 3 into several independent convection space;Intermediate sealing plate 6 is horizontally arranged in convection reactor 3, and intermediate sealing plate 6 divides independent convection space into first convection zone 7 and second convection zone 8, and the bottom of intermediate sealing plate 6 is equipped with communication pipe 9, and first convection zone 7 and second convection zone 8 are communicated by communication pipe 9, and siphon pipeline component is communicated with first convection zone.

[0063] Sewage enters anoxic reaction component, enters convection reactor 3 by pipeline communication component 2, and pipeline communication component 2 is communicated with inlet pipe 10, when water flow flows in pipeline communication component 2, external air is mixed with sewage in pipeline communication component 2 under the action of atmospheric pressure, and sewage is entered into siphon pipeline component by convection reactor 3, when the water level of second convection zone 8 reaches the set water level height, convection reactor 3 stops water, and sewage stays for a period of time, and then convection reactor 3 continues to water, and water level continues to rise, until siphon effect occurs, and siphon pipeline component sucks sewage treated into sedimentation clarifier 4 and deposits purification.

[0064] The anoxic reaction assembly comprises a high water tank 1 arranged at one side of a convection reactor 3 and at a height higher than that of the convection reactor 3, a pipeline communication assembly 2 communicating with the convection reactor 3 below the high water tank 1, a water inlet pipe 12 provided at the bottom of the high water tank 1 and provided with a water inlet valve 13, a high-level vent pipe 14 provided at the bottom of the high water tank 1, a first liquid level meter 18 arranged in the high water tank 1 for monitoring the water level, and a first biological rope filling assembly arranged in the high water tank 1 and comprising a first biological rope filling rack 15 and first biological rope fillings 16.

[0065] A baffle energy dissipation plate 17 is vertically arranged in the high water tank 1 and provided with a plurality of evenly distributed energy dissipation holes.

[0066] The specific surface area of the first biological rope filling 16 is greater than or equal to 5000 m 2 / m 3 , the BOD load of the first biological rope filling 16 is 0.5-3 Kg / m 3 ·d, the COD load of the first biological rope filling 16 is greater than or equal to 1 Kg / m 3 ·d, and the spacing between the first biological rope fillings 16 is 150-200 mm.

[0067] The pipeline communication assembly 2 comprises a first outflow pipe 19 and a second outflow pipe 20, one end of each of the first outflow pipe 19 and the second outflow pipe 20 communicates with a hydraulic turbine fan 21, the other end of the first outflow pipe 19 communicates with the bottom of the high water tank 1, and the other end of the second outflow pipe 20 is arranged in a first convection zone 7.

[0068] The first outflow pipe 19 is L-shaped, the horizontal end of the first outflow pipe 19 communicates with the bottom of the high water tank 1, the horizontal end of the first outflow pipe 19 is provided with an outflow electromagnetic valve 24, the vertical end of the first outflow pipe 19 communicates with the hydraulic turbine fan 21, the second outflow pipe 20 is connected with a horizontal pipe arranged in the first convection zone 7, the horizontal pipe is provided with a plurality of evenly distributed outflow holes 22, the horizontal end and the vertical end of the first outflow pipe 19 respectively communicate with an air inlet pipe 10, and the air inlet pipe 10 is provided with an air inlet electromagnetic valve 23.

[0069] The number of independent convection spaces is the same as that of the pipeline communication assemblies 2, the first convection zone 7 below the intermediate sealing plate 6 in the convection reactor 3 is provided with a first water distribution plate 27 and a second water distribution plate 28, the second water distribution plate 28 is arranged above the first water distribution plate 27, and a dissolved oxygen meter 26 is arranged at the lower part of the convection reactor 3.

[0070] As Figure 2As shown, the bottom of the convection reactor 3 is provided with a blower aeration assembly 25, which is arranged in the first convection zone 7 and includes a blower 251, a main pipeline 252, aeration pipelines 253, microporous aeration discs 254, and a dissolved oxygen meter 26. The blower 251 is connected to the main pipeline 252, and the aeration pipelines 253 are in communication with the main pipeline 252. The aeration pipelines 253 are provided with the microporous aeration discs 254, and the microporous aeration discs 254 are provided with aeration holes. The dissolved oxygen meter 26 is arranged between the first and second water distribution plates 27 and 28.

[0071] The convection reactor 3 is internally provided with a second biological rope filler assembly, which is arranged in the second convection zone 8 and includes a second biological rope filler rack 29 and second biological rope fillers 30. The second biological rope filler rack 29 is vertically arranged in the convection reactor 3, and the second biological rope fillers 30 are arranged on the second biological rope filler rack 29.

[0072] The specific surface area of the second biological rope filler 30 is ≥5000 m 2 / m 3 , the BOD load of the second biological rope filler 30 is 0.5-3 Kg / m 3 ·d, the COD load of the second biological rope filler 30 is ≥1 Kg / m 3 ·d, and the installation spacing of the second biological rope filler 30 is 150-200 mm.

[0073] The convection reactor 3 is internally provided with a second liquid level meter 31 for monitoring the water level, which is arranged in the second convection zone 8. The upper portion of the convection reactor 3 is provided with a pressure reducing valve 32, and the bottom of the convection reactor 3 is provided with a reactor vent pipe 34. The first convection zone 7 of the convection reactor 3 is provided with a plurality of biological ball filler assemblies 33, which are arranged between the first and second water distribution plates 27 and 28. The biological ball filler assembly 33 includes biological ball fillers and a hollow sphere, and the biological ball fillers are arranged in the hollow sphere. The total volume of the hollow spheres of the plurality of biological ball filler assemblies is 45-65% of the space formed between the first and second water distribution plates 27 and 28. The total volume of the biological ball fillers accounts for 25%-35% of the internal space of the hollow sphere.

[0074] The shape of the filler is a cube. The biological ball fillers of the biological ball filler assembly 33 are hydrophilic polyurethane macromolecular high-efficiency biological carrier particles. The specific surface area of the hydrophilic polyurethane macromolecular high-efficiency biological carrier particle filler in the hollow sphere is >4000 m 2 / m 3 During normal operation, the density of the carrier particle filler after biofilm formation is 1.0 g / cm 3 -1.01 g / cm 3The hydrophilic polyurethane polymer high-efficiency biological carrier particle contains a hydrophilic gel component, and the carrier expands after absorbing water after being exposed to water, and the total volume of the particle after absorbing water and expanding and being coated with a film accounts for no more than 60% of the internal space of the hollow sphere.

[0075] The number of siphon pipe assemblies is the same as the number of independent convection spaces; the siphon pipe assembly comprises a siphon main pipe 35, a vacuum pipe 36, and a siphon termination pipe 37; one end of the siphon main pipe 35 communicates with the first convection zone through the intermediate sealing plate 6, the lower part of the sedimentation and clarification tank 4 is provided with an inclined pipe filler 43, and the other end of the siphon main pipe 35 extends into the inclined pipe filler 43 in the sedimentation and clarification tank 4; one end of the vacuum pipe 36 communicates with the top end of the siphon main pipe 35, and the other end extends below the liquid level in the sedimentation and clarification tank 4; the siphon termination pipe 37 communicates with the siphon main pipe 35, and the vacuum pipe 36 and the siphon termination pipe 37 are connected by a pipe; the other end of the siphon main pipe 35 is arranged in the second convection zone 8, and the end of the siphon termination pipe 37 is provided with a siphon terminator 42; the water amount between the siphon terminator 42 and the highest water level of the second liquid level meter 31 is less than 4 / 5 of the total water storage amount in the first convection zone 7.

[0076] The bottom of the sedimentation and clarification tank 4 is provided with a plurality of conical parts 39, the bottom of the conical part 39 is provided with a sludge discharge pipe 40; the lower part of the sedimentation and clarification tank 4 is provided with an inclined pipe filler 43, and one side of the upper part of the sedimentation and clarification tank 4 is provided with a supernatant discharge outlet 44; the sedimentation and clarification tank 4 is provided with a third liquid level meter 41, and the position of the third liquid level meter 41 corresponds to the high liquid level 48 of the sedimentation and clarification tank 4 (the high liquid level 48 is arranged above the supernatant discharge outlet 44).

[0077] The intelligent control cabinet 11 is further provided, and the intelligent control cabinet 11 is provided with a controller; the controller is electrically connected with the first liquid level meter 18, the air inlet electromagnetic valve 23, the outflow electromagnetic valve 24, the air blower aeration assembly 25, the second liquid level meter 31, the pressure reducing valve 32, and the third liquid level meter 41; the controller can control the hydraulic retention time, the process operation period, and the reaction time; the controller adopts the existing PLC technology.

[0078] The use method of the biological membrane method integrated sewage treatment device comprises the following steps:

[0079] S1: the pretreated sewage enters the high-level water tank 1, when the water level in the high-level water tank 1 reaches the upper limit 45 of the water tank liquid level, the water inlet pipe 12 stops water inlet, and a period of time is kept; when the liquid level of the second convection zone 8 of the convection reactor 3 is lower than the siphon terminator 42, the outflow electromagnetic valve 24 is opened, the sewage enters the first convection zone 7 through the pipe connection assembly 2, the air inlet pipe 10 starts to inlet air, and the water turbine blower 21 starts to rotate;

[0080] S2: the sewage in step S1 reaches the intermediate sealing plate 6 at the water level of the first convection zone 7, part of the sewage enters the second convection zone 8 through the communication pipe 9, and the other part of the sewage enters the siphon pipe assembly; the water level in the second convection zone 8 and the siphon pipe assembly continues to rise, and when the water level in the second convection zone 8 reaches the set water level height, the water inlet in the convection reactor 3 stops, and the high-level water tank 1 starts to feed water, and the sewage in the convection reactor 3 is static;

[0081] S3: the sewage in the high-level water tank 1 continues to enter the convection reactor 3, the water level in the second convection zone 8 continues to rise, until siphon action occurs, the water inlet in the convection reactor 3 stops, the sewage in the second convection zone 8 flows into the first convection zone 7 through the communication pipe 9, and flows into the sedimentation and clarification tank 4 through the siphon pipe assembly, when the water level in the second convection zone 8 drops below the siphon terminator 42, the siphon stops, the water body in the convection reactor 3 stops flowing to the sedimentation and clarification tank 4, and after standing, the supernatant of the sedimentation and clarification tank 4 is directly discharged.

[0082] The pretreatment in step S1 includes filtering the sewage; the water inlet pipe 12 stops feeding water in step S1, and the standing time is at least 1h; the standing time of the sewage in the convection reactor 3 in step S2 is 4-8h; when the dissolved oxygen in the first convection zone 7 is less than 3mg / l, aeration is performed when the sewage is standing in the convection reactor 3 in step S2, and when the dissolved oxygen in the convection reactor reaches 6mg / l, the aeration is stopped; the standing time in step S3 is 1-1.5h; the active sludge concentration in the first convection zone 7 is 1500mg / L~4000mg / L.

[0083] Therefore, for small sewage treatment stations, Bernoulli's principle and siphon principle are used in the process to realize auxiliary oxygenation and full fluidization of the filler through physical action, reduce the difficulty of operation and maintenance, realize full contact between the sewage and the filler, and further reduce energy consumption.

[0084] Implementation steps:

[0085] The pretreated (pre-treatment is to use fence filter) sewage enters the high water tank 1 through the inlet pipe 12, when the water level in the high water tank 1 reaches the upper limit of the water tank liquid level 45, stop water, the first liquid level meter 18 will signal to the intelligent control cabinet 11 (using existing PLC technology), static for a period of time T1 (≥1h), and the second convection zone 8 liquid level of the flow reactor 3 is lower than the second water level 47, the outlet electromagnetic valve 24 is opened, and the sewage enters the pipeline communication assembly. When the water flows in the pipeline communication assembly 2, according to Bernoulli's principle, the pressure is small where the flow is large, at this time, the external air will enter the first outlet pipe 19 under the action of atmospheric pressure and mix with the sewage in the pipeline communication assembly 2. The water turbine of the water turbine fan 21 and the fan turbine gear transmission ratio 1:12, the fan turbine rotation speed is not less than 650r / min, the turbine blade rotates under the push of water flow, at the same time cutting the air bubbles sucked by the air inlet pipe 10, the outside turbine rotates synchronously, the turbine rotation produces vacuum negative pressure, and the air is pushed into the second outlet pipe 20 again and mixed with the sewage in the pipeline communication assembly 2. The sewage continues to flow in the first outlet pipe 19 and the second outlet pipe 20, and is uniformly distributed into the first convection zone 7 through the outlet hole 22. At this time, the sewage passes through the second water plate 28, the second biological rope filling assembly and the first water plate 27 in turn under the action of gravity. With the continuous rise of the water level in the first convection zone 7, when it reaches the intermediate sealing plate 6, part of the sewage enters the second convection zone 8 through the communication pipe 9, and the other part of the sewage enters the siphon main pipe 35. At this time, the water continues to increase, and the water level in the second convection zone 8 and the siphon main pipe 35 continues to rise. When the water level of the second convection zone 8 submerges the upper surface of the second biological rope filling assembly and reaches the set water level height (the first water level 46), the second liquid level meter 31 transmits the signal to the controller in the intelligent control cabinet 11, the outlet electromagnetic valve 24 is closed, the inlet pipe 12 of the high water tank 1 is water, at the same time, the sewage stays in the flow reactor 3 for a period of time T2 (4-8h), at this time, the first convection zone 7 dissolved oxygen instrument 26 transmits the reading information to the controller in the intelligent control cabinet 11, if the dissolved oxygen in the first convection zone 7 is less than 3mg / l, the air blower 251 is started, and the air is aerated. When the dissolved oxygen in the flow reactor reaches 6mg / l, the air blower 251 is closed, and after the time reaches T2 (4-8h), the outlet electromagnetic valve 24 is opened, and the water level in the second convection zone 8 continues to rise. When the water level cannot continue to rise under the action of air pressure, the sewage unidirectionally flows into the siphon main pipe 35, when the water level in the siphon main pipe 35 reaches the pipe opening of the vacuum extraction pipe 36, the water in the siphon main pipe 35 flows into the sedimentation tank 4 through the vacuum extraction pipe 36, and the air in the siphon main pipe 35 is taken out. Because the end of the siphon main pipe 35 is located below the low liquid level 49 of the sedimentation tank 4 (the low liquid level 49 is set below the supernatant outlet 44 and above the inclined pipe filling 43), a negative pressure is formed in the siphon main pipe 35, and the water level in the pipe gradually rises until the whole pipe is filled.At this time, the siphon phenomenon occurs, the sewage flows into the sedimentation tank 4 through the siphon main pipe 35, and the outlet electromagnetic valve 24 is closed at this time. The water body in the second convection zone 8 flows into the first convection zone 7 through the connecting pipe 9 under the action of air pressure, siphon effect and gravity, and passes through the first water distribution plate 27, the biological ball filling assembly 33 and the second water distribution plate 28, and then flows into the sedimentation tank 4 through the siphon main pipe 35.

[0086] At this time, the water body in the second biological rope filling assembly and the biological ball filling assembly 33 forms a turbulent state under the action of siphon flow, the suspended filling of the second biological rope filling assembly shakes, and the biological ball filling assembly 33 rotates and rolls. The filling of the second biological rope filling assembly and the biological ball filling assembly 33 can be fully contacted with the sewage for the second time while the aged biofilm is washed away. When the water level in the second convection zone 8 drops below the siphon terminator 42, air is sucked into the siphon main pipe 35, and the siphon is terminated. The water body in the convection reactor 3 stops flowing to the sedimentation tank 4.

[0087] The water body flowing into the sedimentation tank 4 through the siphon main pipe 35 is precipitated through the inclined pipe T3 (1-1.5h), and then the supernatant is discharged through the supernatant discharge port 44 to achieve discharge standard.

[0088] The first biological rope filling assembly in the high-level water tank 1 can strengthen anaerobic reaction.

[0089] In addition, due to the air pressure generated by aeration in the first convection zone 7, part of the liquid enters the upper second convection zone 8 through the connecting pipe 9 as nitrification liquid of the aerobic tank to denitrify. Therefore, the water body in the second convection zone 8 only has a small part of air brought in through the first outlet pipe 19 and the second outlet pipe 20 and a small part of aerobic nitrification liquid pressed in under the action of aeration pressure, and the dissolved oxygen content is between the dissolved oxygen content of the high-level water tank 1 and the dissolved oxygen content of the first convection zone 7 of the biological ball filling assembly 33, which plays an anoxic denitrification role.

[0090] Example 2

[0091] A certain pilot plant uses real rural domestic sewage in North China. The parameters of the biological rope filling assembly in the high-level water tank 1 are as follows: the specific surface area of the first biological rope filling assembly 16 is ≥5000m 2 / m 3 , the BOD load of the first biological rope filling assembly 16 is 0.5-3Kg / m 3 ·d, the COD load of the first biological rope filling assembly 16 is ≥1Kg / m 3 ·d, and the spacing between the first biological rope filling assemblies 16 is the installation spacing of 200mm.

[0092] The specific surface area of the second biological rope filling assembly 30 is ≥5000m 2 / m3 BOD load of the second bio-rope filler 30 is 0.5-3 Kg / m 3 COD load of the second bio-rope filler 30 is ≥1 Kg / m 3 The installation spacing of the second bio-rope filler 30 is 200 mm.

[0093] The total volume of the hollowed-out sphere of the bio-ball filler assembly 33 is 45% of the space between the first and second water distribution plates 27 and 28. The total volume of the hydrophilic polyurethane macromolecule high-efficiency biological carrier particles in the bio-ball is 30% of the internal space of the bio-ball, and the total volume of the particles after water absorption and expansion and biofilm formation is about 50% of the internal space of the bio-ball.

[0094] The influent COD is 272.06 mg / L-325.17 mg / L, the ammonia nitrogen is 21.6 mg / L-30.3 mg / L, and the total nitrogen is 25.3 mg / L-37.9 mg / L. The daily treatment capacity of the device is 8 m 3 / d.

[0095] The inoculation and biofilm formation method is used for biofilm formation and start-up. The sludge is taken from the aerobic activated sludge and anaerobic activated sludge of the nearby rural sewage treatment station, and is respectively added to the first counter-flow reactor 3 containing the bio-ball filler assembly 33 and the high-level water tank 1 containing the first bio-rope filler assembly at a concentration of 3500 mg / L.

[0096] First, enter the stagnant exposure biofilm formation phase. At the beginning, the high-level water tank 1 and the counter-flow reactor 3 are aerated at the same time, and the dissolved oxygen is controlled between 3-5 mg / L. After 2 days, gradually reduce the aeration amount of the high-level water tank 1, so that the dissolved oxygen is controlled at about 0.5 mg / L, and gradually cultivate denitrifying bacteria.

[0097] After one day of stagnant exposure, start water change. In order to maintain the amount of inoculated sludge, the water change rate is 50% per cycle, 2 cycles per day, and each cycle is 12 hours. On the 8th day, the COD and ammonia nitrogen removal rates of the reaction system are stable at more than 60%, and the system enters the normal influent and effluent operation phase.

[0098] The pretreated sewage enters the high water tank 1 through the inlet pipe 12. When the water level in the high water tank 1 reaches the upper limit of the water level 45, the water inlet is stopped. The first liquid level meter 18 transmits a signal to the controller in the intelligent control cabinet 11. After a period of time (T1 = 1h), when the liquid level of the second convection zone 8 of the convection reactor 3 is lower than the second water level 47, the outlet electromagnetic valve 24 is opened at this time, and the sewage enters the first outlet pipe 19. The first outlet pipe 19 and the second outlet pipe 20 are connected with the high water tank 1. The horizontal end and the vertical end of the first outlet pipe 19 are both connected with the air inlet pipe. External air enters the first outlet pipe 19 under the action of atmospheric pressure by using Bernoulli's principle and mixes with the sewage. A hydraulic turbine fan 21 is arranged. The turbine blades of the hydraulic turbine fan 21 rotate under the push of the water flow. While cutting the air bubbles sucked in by the air inlet pipe 10, the outside turbine is driven to rotate synchronously. The rotation of the turbine generates vacuum negative pressure, which pushes air into the second outlet pipe 20 again and mixes with the sewage in the pipeline communication assembly 2. The hydraulic turbine fan 21 adopts the existing technology.

[0099] The sewage continues to flow in the second outflow pipe 20, and through the multiple outflow holes 22 provided in the horizontal pipe, the sewage is uniformly sprayed in a trickling manner to the first countercurrent zone 7. At this time, the sewage flows under the action of gravity through the second water distribution plate 28, the biological ball filling assembly 33, the first water distribution plate 27, and as the water level in the first countercurrent zone 7 continuously rises, when reaching the intermediate sealing plate 6, part of the sewage enters the second countercurrent zone 8 through the communication pipe 9, and the other part of the sewage enters the siphon main pipe 35. At this time, the water inlet continues to increase, and the water level in the second countercurrent zone 8 and the siphon main pipe 35 continues to rise, and when the water level in the second countercurrent zone 8 submerges the upper surface of the second biological rope filling assembly and reaches the set first water level 46 (the set first water level 46 is 20 cm above the upper surface of the countercurrent reactor 3), the second liquid level meter 31 transmits a signal to the controller in the intelligent control cabinet 11, the outflow electromagnetic valve 24 is closed, and the water inlet pipe 12 of the high-level water tank 1 starts to inlet water. At the same time, the sewage stays in the countercurrent reactor 3 for a period of time (T2=6h), and at this time, the dissolved oxygen meter 26 (the dissolved oxygen meter 26 adopts the prior art) in the first countercurrent zone 7 transmits reading information to the controller in the intelligent control cabinet 11. If the dissolved oxygen in the first countercurrent zone 7 is lower than 3 mg / l, the air blower 251 is started to perform aeration, and when the dissolved oxygen in the countercurrent reactor reaches 6 mg / l, the air blower 251 is closed. After the time reaches T2=6h, the outflow electromagnetic valve 24 is opened, and the water level in the second countercurrent zone 8 continues to rise. When the water level cannot continue to rise under the action of air pressure, the sewage unidirectionally flows into the siphon main pipe 35, and when the water level in the pipe reaches the pipe opening of the vacuum extraction pipe 36, the water flow in the siphon main pipe 35 flows into the sedimentation and clarification tank 4 through the vacuum extraction pipe 36, and at the same time, the air in the siphon main pipe 35 is taken out. Since the water outlet of the siphon main pipe 35 is below the low liquid level 49 of the sedimentation and clarification tank 4, a negative pressure is formed in the siphon main pipe 35, and the water level in the pipe gradually rises until the entire pipe body of the siphon main pipe 35 is filled. At this time, the siphon phenomenon occurs, the sewage flows into the sedimentation and clarification tank 4 through the siphon main pipe 35, and at the same time, the outflow electromagnetic valve 24 is closed. At this time, the water body in the second countercurrent zone 8 flows into the first countercurrent zone 7 through the communication pipe 9 under the action of air pressure, siphon effect and its own gravity, and flows upward from the first countercurrent zone 7 through the first water distribution plate 27, passes through the reaction zone of the biological ball filling assembly 33 and the second water distribution plate 28, and flows into the sedimentation and clarification tank 4 through the siphon main pipe 35.

[0100] At this time, the biological ball filling assembly 33 in the first countercurrent zone 7 forms a turbulent state under the action of siphon water flow, the second biological rope filling 30 shakes, the biological ball filling assembly 33 continuously rotates and rolls passively, the filling of the biological ball filling assembly 33 fully contacts the sewage for the second time, and at the same time, the aged biological membrane is washed away. When the water level in the second countercurrent zone 8 drops below the siphon terminator 42, air is sucked into the siphon main pipe 35, and the siphon is terminated. The water body in the countercurrent reactor 3 stops flowing to the sedimentation and clarification tank 4.

[0101] The water body flowing into the sedimentation clarifier 4 through the siphon main pipe 35 is settled through the inclined pipe sedimentation T3=1h, and the supernatant is discharged through the supernatant discharge port 44 to achieve discharge up to standard.

[0102] The biological membrane on the filler changes in shape. After 2 days of aeration and settling, a large amount of light yellow biological membrane is attached to the second biological rope filler 30 in the second convection zone 8. On the 8th day, the biological membrane attached to the surface of the second biological rope filler 30 turns yellow-brown, and the inside is slightly black. From the 9th day to the 35th day, the amount of biological membrane attached to the second biological rope filler 30 increases, and the black part of the biological membrane attached to the filler also increases. From the 36th day to the 48th day, the black part of the biological membrane surface of the second biological rope filler 30 slowly turns dark brown. On the 49th day, the surface of the second biological rope filler 30 presents a thin layer of yellow-brown biological membrane, and the inside is black biological membrane, and the color tends to be stable.

[0103] After 2 days of aeration and settling, the carrier particles in the biological ball filler assembly 33 of the first convection reactor 3 are uniformly light yellow. From the 4th day, the amount of biological membrane attached to the inside of the biological ball filler increases, and the color gradually deepens. Until the 10th day, the biological membrane attached to the biological ball filler is still mainly yellow. On the 11th day, the color of the biological membrane on the surface of the biological ball filler starts to turn yellow-brown. On the 19th day, the biological membrane on the surface of the biological ball filler has turned dark brown. On the 32nd day, the color of the biological membrane on the surface of the biological ball filler starts to turn from dark brown to yellow-brown. From the 33rd day to the 42nd day, the amount of biological membrane attached to the biological ball filler increases, and the color of the biological membrane on the surface of the biological ball filler is mainly yellow-brown, and the color tends to be stable.

[0104] After 3 days of aeration and settling, the surface of the first biological rope filler 16 in the high-level water tank 1 reactor is light gray. From the 3rd day to the 15th day, the amount of biological membrane attached to the first biological rope filler 16 increases, and the color is mainly gray, with local blackening. On the 16th day, the outside of the first biological rope filler 16 is dark gray, and the inside is black. From the 17th day to the 39th day, the amount of biological membrane attached to the first biological rope filler 16 increases, and the surface of the biological membrane attached to the first biological rope filler 16 turns from dark gray to black-brown, and the color tends to be stable.

[0105] After nearly 6 months of operation, excluding the early biofilm startup stage, the normal continuous standard operation lasted for 143 days, a total of 860m 3, the power consumption is 779 KWh, the equivalent power consumption is 0.91 KWh / ton, which is 33.82% lower than 1.375 KWh / ton of the existing process. The COD detection value of the effluent is 21.35 mg / l-41.43 mg / l, the COD removal rate is 86.33%-92.76%; the total nitrogen detection value of the effluent is 11.12 mg / l-17.95 mg / l, the total nitrogen removal rate is 52.63%-56.68%; the ammonia nitrogen detection value of the effluent is 5.57 mg / l-7.92 mg / l, the ammonia nitrogen removal rate is 73.42%-76.65%. All can reach the national and local emission standards.

[0106] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated wastewater treatment device using a biofilm method, characterized in that: It includes an anoxic reaction assembly, a pipeline connection assembly, a convection reactor, and a sedimentation and clarification tank; the anoxic reaction assembly is connected to the convection reactor through the pipeline connection assembly, and the convection reactor is connected to the sedimentation and clarification tank through the siphon pipeline assembly; the bottom of the elevated water tank is located above the convection reactor, and one end of the siphon pipeline assembly is located inside the convection reactor, and the other end is located inside the sedimentation and clarification tank. The convection reactor is vertically equipped with several baffles, which divide the convection reactor into several independent convection spaces. The convection reactor is horizontally equipped with an intermediate sealing plate, which divides the independent convection spaces into a first convection zone and a second convection zone. The bottom of the intermediate sealing plate is equipped with a connecting pipe, and the first convection zone and the second convection zone are connected through the connecting pipe. The siphon pipe assembly is connected to the first convection zone. The anoxic reaction assembly includes an elevated water tank; the elevated water tank is located on one side of the convection reactor, and the height of the elevated water tank is higher than the height of the convection reactor.

2. The integrated wastewater treatment device using a biofilm method according to claim 1, characterized in that: The lower part of the elevated water tank is connected to the convection reactor via several pipe connections. The bottom of the elevated water tank is equipped with a water inlet pipe, and the water inlet pipe is equipped with a water inlet valve; The bottom of the elevated water tank is equipped with an elevated vent pipe.

3. The integrated wastewater treatment device using a biofilm method according to claim 2, characterized in that: The elevated water tank is equipped with a first level gauge for monitoring the water level. The elevated water tank is equipped with a first biological rope packing assembly, which includes a first biological rope packing frame and a first biological rope packing. Several first biological rope packings are evenly arranged on the first biological rope packing frame. The first biological rope packing frame is vertically arranged inside the elevated water tank. A baffle energy dissipation plate is vertically arranged inside the elevated water tank, and the baffle energy dissipation plate has several evenly distributed energy dissipation holes.

4. The integrated wastewater treatment device using a biofilm method according to claim 1, characterized in that: The pipeline connection assembly includes a first outlet pipe and a second outlet pipe; One end of both the first and second outlet pipes is connected to the hydraulic turbine fan, the other end of the first outlet pipe is connected to the bottom of the high-level water tank, and the other end of the second outlet pipe is located in the first convection zone. The first outlet pipe is L-shaped. The horizontal end of the first outlet pipe is connected to the bottom of the high-level water tank. The horizontal end of the first outlet pipe is equipped with an outlet solenoid valve. The vertical end of the first outlet pipe is connected to the hydraulic turbine fan. The second outlet pipe is connected to a horizontal pipe located in the first convection zone, and the horizontal pipe is provided with several evenly distributed outlet holes. The horizontal and vertical ends of the first outlet pipe are connected to the inlet pipe, and the inlet pipe is equipped with an inlet solenoid valve.

5. The integrated wastewater treatment device using a biofilm method according to claim 4, characterized in that: The number of independent convection spaces is the same as the number of pipe-connected components; A first water distribution plate and a second water distribution plate are provided in the first convection zone below the intermediate sealing plate of the convection reactor, and the second water distribution plate is located above the first water distribution plate; the dissolved oxygen meter is located in the lower part of the convection reactor. The bottom of the convection reactor is equipped with a blower aeration assembly, which is located in the first convection zone. The blower aeration assembly includes a blower, a main pipe, an aeration pipe, a microporous aeration disc, and a dissolved oxygen meter. The blower is connected to the main pipeline, and several aeration pipes are connected to the main pipeline; The aeration pipe is equipped with several microporous aeration discs, and the microporous aeration discs are equipped with aeration holes; The dissolved oxygen meter is positioned between the first and second water distribution plates.

6. The integrated wastewater treatment device using a biofilm method according to claim 5, characterized in that: The convection reactor is equipped with a second biorode packing assembly, which is located in the second convection zone. The second biorode packing assembly includes a second biorode packing frame and second biorode packing. The second biorode packing frame is vertically arranged in the convection reactor, and several second biorode packings are arranged on the second biorode packing frame.

7. The integrated wastewater treatment device using a biofilm method according to claim 6, characterized in that: A second level gauge is installed inside the convection reactor, and the second level gauge is located in the second convection zone. The upper part of the convection reactor is equipped with a pressure reducing valve, and the bottom of the convection reactor is equipped with a reactor vent pipe; The first convection zone of the convection reactor is equipped with several biosphere packing assemblies, which are located between the first and second water distribution plates. The biosphere packing assembly includes biosphere packing and a hollow sphere, with the biosphere packing disposed inside the hollow sphere; The packing material is cubic in shape.

8. The integrated wastewater treatment device using a biofilm method according to claim 6, characterized in that: The number of siphon duct assemblies is the same as the number of independent convection spaces; The siphon pipe assembly includes a siphon main pipe, a vacuum pipe, and a siphon termination pipe; One end of the siphon main pipe passes through the middle sealing plate and connects to the first convection zone. The lower part of the sedimentation and clarification tank is equipped with inclined tube packing, and the other end of the siphon main pipe extends into the inclined tube packing inside the sedimentation and clarification tank. One end of the vacuum tube is connected to the top of the siphon main tube, and the other end extends below the liquid surface in the sedimentation and clarification tank. The siphon termination pipe is connected to the siphon main pipe, and the vacuum pipe and the siphon termination pipe are connected by a pipeline; the other end of the siphon main pipe is located in the second convection zone, and the end of the siphon termination pipe is equipped with a siphon terminator.

9. The integrated wastewater treatment device using a biofilm method according to claim 8, characterized in that: The water volume between the siphon terminator and the highest water level set by the second level gauge is less than 4 / 5 of the total water volume stored in the first convection zone.

10. The integrated wastewater treatment device using a biofilm method according to claim 8, characterized in that: The bottom of the sedimentation and clarification tank is equipped with several conical components, and the bottom of the conical components is equipped with sludge discharge pipes; The lower part of the sedimentation and clarification tank is equipped with inclined tube packing, and the upper part of the sedimentation and clarification tank is equipped with a supernatant discharge outlet on one side. A third level gauge is installed in the sedimentation and clarification tank, and the position of the third level gauge corresponds to the high level of the sedimentation and clarification tank.

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